Konica Minolta magicolor 1680MF/1690MF/4690MF :  foo2zjs - foo2hp - foo2xqx - foo2lava - foo2qpdl - foo2oak
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Konica 1680MFP Colors Problems
Posted by: thony06 ()
Date: June 13, 2011 07:42PM

I have problems with printings with my new Konica 1680MFP on Ubuntu 11.04 x64.
When I select one of the non ICM color mode, colors are very dark. Much more than the original photo. Texts are also blured.
When I use an ICM profile, texts are well printed, photos are less dark but still too dark but there is a sort of dithering.

You can see what it looks like in the picture below :


On Ubuntu 10.10, there is no problem, all printings are good.

So I tried some tests :
- I installed your version of foo2lava on 11.04, nothing changed : too dark.
- I installed your version of foo2lava on 11.04, nothing changed : good colors
- I installed GS 9.01 on 10.10 and nothing changed : good colors
- I processed a lava file with foo2lava-wrapper on 10.10 and printed this file on 11.04, result : too dark.

So I don't know what's hapenning.
Can you help me?

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Re: Konica 1680MFP Colors Problems
Posted by: rickrich ()
Date: June 13, 2011 08:35PM

Did you do:

$ cd foo2zjs
$ make
$ ./getweb 1680 # Important!
$ sudu make install

And:

Printer Properties -> Color Mode -> Color - use ICM color profile
Printer Properties -> Halftone Algorithm -> Default (OR Accurate Screens)
Printer Properties -> ICM Color Profile -> km-16* (default)

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Re: Konica 1680MFP Colors Problems
Posted by: thony06 ()
Date: June 14, 2011 09:52AM

Yes I did that, I think your last version is well installed.
Here are the versions of what is installed

anthony@superpc:~$ foo2lava-wrapper -V
$Id: foo2lava-wrapper.in,v 1.47 2011/01/14 23:21:39 rick Exp $
$Id: foo2lava.c,v 1.39 2011/06/09 13:33:01 rick Exp $
$Id: foo2zjs-pstops.sh,v 1.15 2011/01/13 17:48:29 rick Exp $

I didn't try this ICM and Halftone Algorithm but is it normal that the "Color - Photo only" doesn't work as well as before?

I'll try this ICM and Halftone Algorithm this evening when I will be back at home...

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Re: Konica 1680MFP Colors Problems
Posted by: rickrich ()
Date: June 14, 2011 11:07AM

"Color - Photo only", etc. *only works* on KM 2300DL.

You should use "Color - use ICM color profile".

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Re: Konica 1680MFP Colors Problems
Posted by: thony06 ()
Date: June 14, 2011 04:00PM

Well, there is a difference between Default and Accurate halftone algorithms. Default seems to be the best : there is less dithering.
On the other side, there is a strange problem, when i print from Shotwell or Eye of Gnome, the print is dithered. If I print to a PS file, open this PS file with evince and print it, there is no dithering, colors are a little too green, yellow and dark...but a little less dark.
The rendering is quite different but never as good as on Ubuntu 10.10...

Maybe the problem is not with your drivers but I'd like to discover where it is...

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